Final answer:
In 1789, the Third Estate in France pledged to seize power from the nobility and clergy through political actions like the Tennis Court Oath and storming of the Bastille.
Step-by-step explanation:
The subject of the question is history. In 1789, the Third Estate in France pledged to seize power from the nobility and clergy. The Third Estate was made up of the commoners, who were the majority of the French population and faced heavy taxation and economic hardships compared to the privileged First and Second Estates. They declared themselves as the National Assembly and took political action, such as the Tennis Court Oath and storming of the Bastille, to challenge the authority of the nobility and clergy.